<?php

/**
 * LoginForm class.
 * LoginForm is the data structure for keeping
 * user login form data. It is used by the 'login' action of 'SiteController'.
 */
class LoginForm extends CFormModel {
	public $username;
	public $password;
	public $rememberMe;

	private $_identity;

	/**
	 * Declares the validation rules.
	 * The rules state that username and password are required,
	 * and password needs to be authenticated.
	 */
	public function rules() {
		return array(
		// username and password are required
		array('username, password', 'required'),
		// rememberMe needs to be a boolean
		array('rememberMe', 'boolean'),
		// password needs to be authenticated
		array('password', 'authenticate'), );
	}

	/**
	 * Declares attribute labels.
	 */
	public function attributeLabels() {
		return array('rememberMe' => 'Remember me next time', );
	}

	/**
	 * Authenticates the password.
	 * This is the 'authenticate' validator as declared in rules().
	 */
	public function authenticate($attribute, $params) {
		if (!$this -> hasErrors()) {
			$this -> _identity = new UserIdentity($this -> username, $this -> password);
			if (!$this -> _identity -> authenticate())
				$this -> addError('password', 'Incorrect username or password.');
		}
	}

	/**
	 * Logs in the user using the given username and password in the model.
	 * @return boolean whether login is successful
	 */
	public function login() {
		if ($this -> _identity === null) {
			$this -> _identity = new UserIdentity($this -> username, $this -> password);
			$this -> _identity -> authenticate();
		}
		if ($this -> _identity -> errorCode === UserIdentity::ERROR_NONE) {
			$duration = $this -> rememberMe ? 3600 * 24 * 30 : 0;
			// 30 days
			Yii::app()-> user -> login($this -> _identity, $duration);
			User::model()->updateByPk($this -> _identity -> id, array('last_login_time' => new CDbExpression('NOW()')));
			return true;
		} else
			return false;
	}

}
